918612646 has 64 divisors (see below), whose sum is σ = 1812049920. Its totient is φ = 339655680.

The previous prime is 918612599. The next prime is 918612647. The reversal of 918612646 is 646216819.

918612646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×918612646² = 1687698386782242632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918612647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136906 + ... + 143458.

It is an arithmetic number, because the mean of its divisors is an integer number (28313280).

Almost surely, 2^918612646 is an apocalyptic number.

918612646 is a deficient number, since it is larger than the sum of its proper divisors (893437274).

918612646 is a wasteful number, since it uses less digits than its factorization.

918612646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6629.

The product of its digits is 124416, while the sum is 43.

The square root of 918612646 is about 30308.6232943695. The cubic root of 918612646 is about 972.0996943982.

The spelling of 918612646 in words is "nine hundred eighteen million, six hundred twelve thousand, six hundred forty-six".